Lower set insert with a lower ball seat for a downhole plug



FIG. 1 is a perspective view of a lower set insert with lower ball seat for a downhole plug showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front side plan view thereof, wherein the front side plan view and the back side plan views are identical;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a left side plan view thereof, wherein the left side plan view and the right side plan views are identical.

The broken lines in the drawings depict unclaimed environmental subject matter. 

CLAIM The ornamental design for a lower set insert with lower ball seat for a downhole plug, as shown and described. 